Shown with a cast-on count of 45 stitches.  

• Row 1 (RS): K2, p2, knit to last 4 sts, p2, k2.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: P2, k2, purl to last 4 sts, k2, p2.
• Row 3: K2, p2, ssk, k4, yo, k1, *yo, k4, sl2-k1-p2sso, k4, yo, k1, repeat from * to last 10 sts, yo, k4, k2tog, p2, k2.
• Row 5: K2, p2, ssk, k3, yo, k2, *k1, yo, k3, sl2-k1-p2sso, k3, yo, k2, repeat from * to last 10 sts, k1, yo, k3, k2tog, p2, k2.
• Row 7: K2, p2, ssk, k2, yo, k2tog, yo, k1, *yo, ssk, yo, k2, sl2-k1-p2sso, k2, yo, k2tog, yo, k1, repeat from * to last 10 sts, yo, ssk, yo, k2, k2tog, p2, k2.
• Row 9: K2, p2, ssk, k1, yo, k2tog, yo, k2, *k1, yo, ssk, yo, k1, sl2-k1-p2sso, k1, yo, k2tog, yo, k2, repeat from * to last 10 sts, k1, yo, ssk, yo, k1, k2tog, p2, k2.
• Row 11: K2, p2, ssk, yo, k2tog, yo, k3, *k2, yo, ssk, yo, sl2-k1-p2sso, yo, k2tog, yo, k3, repeat from * to last 10 sts, k2, yo, ssk, yo, k2tog, p2, k2.
• Row 13: K2, p2, k1, yo, ssk, k1, k1 PB, k2, *k1, k1 PB, k1, k2tog, yo, k1, yo, ssk, k1, k1 PB, k2, repeat from * to last 10 sts, k1, k1 PB, k1, k2tog, yo, k1, p2, k2.
• Row 15: K2, p2, k1, yo, k1, ssk, k1, k1 PB, k1, *k1 PB, k1, k2tog, [k1, yo] twice, k1, ssk, k1, k1 PB, k1, repeat from * to last 10 sts, k1 PB, k1, k2tog, k1, yo, k1, p2, k2.
• Row 17: K2, p2, k1, yo, k2, ssk, k1, k1 PB, *k1, k2tog, k2, yo, k1, yo, k2, ssk, k1, k1 PB, repeat from * to last 10 sts, k1, k2tog, k2, yo, k1, p2, k2.
• Row 19: K2, p2, k1, yo, k3, ssk, k1, *k2tog, k3, yo, k1, yo, k3, ssk, k1, repeat from * to last 10 sts, k2tog, k3, yo, k1, p2, k2.
• Row 21: K2, p2, k1, yo, [ssk, yo] twice, sl2-k1-p2sso, *yo, [k2tog, yo] twice, k1, yo, [ssk, yo] twice, sl2-k1-p2sso, repeat from * to last 9 sts, yo, [k2tog, yo] twice, k1, p2, k2.
• Repeat rows 1-2.